3.2 Certification of automotive GNSS receivers using aerial image data

Abstract

: A new method for calibration, validation aiming at certification of GNSS receivers used in the automotive industry addressing the levels 3 and 4 of automation under real world conditions is presented. The method uses simultaneously acquired high-resolution aerial image data, from a helicopter, which is precisely georeferenced with Ground Control Points. The method provides a reference trajectory for vehicles in GNSS critical areas, e.g., GNSS-denied type environments. The images obtained contain the vehicle’s roof with the signalized GNSS receiver antenna. Together with a precise height model of the road surface, the absolute position of the GNSS receiver in world coordinates can be derived from the position in the image. The main results of a test campaign, performed in July 2021, using the method are presented. It was investigated how the quality of the GNSS sensors is influenced by the environment (Rural, Highway and Urban) and what added value the method provides. The method proved to be resilient and robust to situations where the GNSS position accuracy degrades, even when RTK is used, as local effects do not impact the new method. The method provides high-precision reference trajectories facilitating calibration, validation, and conformity testing. In this contribution the focus will be set on the validation and testing process leading to certification.